Independent Engineering Services for Construction of 4 laning of Patna- Arrah- Sasaram corridor Package 2 Section 1- Garhani at Ch Km 73 700 to Patar at Ch Km 84 300 & Section 2- Greenfield from Sadisopur at Patna Ring Road ( NH- 131G ) Ch Km 0 000 to Asani ( at NH- 319 ) at Ch Km 35 800 of NH- 119A in the State of Bihar on HAM Mode